One of the most common questions we get asked is 'do I need to replace my double glazing windows, or can they be fixed?' The answer to which is often dependant on the condition of not just the double glazing unit but also the frames that hold the window in. Replacing the windows on your house is a significant investment, to make sure you are making the right decision, we have created a list of the most common reasons we often advise our customers to get new windows installed.